Decay
Games like Decay

Find the Steam hidden gems

single-players with secrets you find without a guideor

Games like Decay

A single-player science incremental game about crafting unstable nuclei and observing decay chains, with an educational loop and short-session pacing.

Simultree
A compact ~4-hour incremental game with a quirky, 'one more round' loop of monitoring life simulations to earn skill-tree points.
2026-04-15
- Strategy
- Simulator

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Games like Decay | IndieDex

Decay
Games like Decay

Find the Steam hidden gems

single-players with secrets you find without a guideor

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Games like Decay

A single-player science incremental game about crafting unstable nuclei and observing decay chains, with an educational loop and short-session pacing.

Simultree
A compact ~4-hour incremental game with a quirky, 'one more round' loop of monitoring life simulations to earn skill-tree points.
2026-04-15
- Strategy
- Simulator

Feed the Reactor

A compact casual idle/incremental game where you combine elements to fuel a reactor, unlock tech, and explore a strange galaxy, with a satisfying progression loop and a story that emerges near the end.

2026-01-06

Science fiction
Strategy
Bird view / Isometric
Simulator

Antivirus PROTOCOL

A compact incremental strategy game about upgrading an antivirus to destroy a global virus, with rewarding but sometimes slow progression.

2025-09-17

Action
Strategy
Indie
Simulator

Diggin

A short, casual incremental digging adventure through a meteor crater, hunting cosmic treasure and unraveling the fate of the Moles.

2026-07-16

Strategy
Indie
Side view

Lemonade Apocalypse

A short, humorous clicker where lemonade pricing and upgrades lead to climate-changing world politics.

2024-04-05

Indie
Side view
Business

Idle Deepcore

A compact ~10-hour incremental mining game about automating deep digs, smelting ores, and growing parallel mines into an underground industry with optional hands-on control.

2026-04-14

Indie
Side view
Simulator

Idle Evolution

A casual, educational incremental game about managing atoms to reach evolution.

2017-04-03

Strategy
Indie
Simulator

Project Chemistry

A compact ~6.5-hour chemistry sandbox and quest-mode sim where you trigger reactions and synthesize molecules, with a playful educational edge.

2021-06-22

First person
Indie
Simulator
Sandbox
Educational

Sixty Four

A casual single-player idle factory sim set in a surreal void, mixing resource gathering, crafting, automation, and upgrades, with highly variable reviewer playtimes (median ~7.5 hours).

2024-03-04

Strategy
Bird view / Isometric
Indie
Simulator
Sandbox

Swarm Simulator: Evolution

A free-to-play idle sim about hatching absurd numbers of bugs and conquering the universe, with a lighthearted tone and a playtime around 8 hours.

2019-02-25

Indie
Simulator
Role-playing (RPG)

Drop and Grow

A brief, calming incremental clicker about growing plants by watering them to restore nature.

2026-05-21

Strategy
Bird view / Isometric
Indie
Simulator

Criticality

A compact single-player incremental sim about atom-splitting chain reactions, featuring idle progression and prestige resets.

2026-04-28

Indie

Simultree